题目内容
如图,足够长的小平板车B的质量为M,以水平速度
向右在光滑水平面上运动,与此同时,质量为m的小物体A从车的右端以水平速度
沿车的粗糙上表面向左运动。若物体与车面之间的动摩擦因数为
,则在足够长的时间内
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241240426333367.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124042243312.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124042243312.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124042446293.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241240426333367.png)
A.若M>m,物体A对地向左的最大位移是![]() |
B.若M<m,小车B对地向右的最大位移是![]() |
C.无论M与m的大小关系如何,摩擦力对平板车的冲量均为![]() |
D.无论M与m的大小关系如何,摩擦力的作用时间均为![]() |
D
若M>m,物体A对地向左的最大位移是:
,
;若M<m,小车B对地向右的最大位移是:
,
;两物体最终共速:
,
,摩擦力的作用时间:t=![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043522481.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043038889.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043070948.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043085737.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241240431161064.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043444975.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043460879.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043491882.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043522481.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124043038889.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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